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(NoModel.) 2 Sheets-Sheet 1 S. F. WELCH.

- n ROAD GRADEAR. No. 879,550. kl Patented Mar. 1

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S. P. WELCH.

ROAD GRADBB.

PatentedMar. 18, 1888.

N. PETERS. mwmmgmphen wminm. u. CJ

described NrTED STATES PATENT Ifrricn.

S. FRANK WELCH, OF MOUNT PLEASANT, IOVA, ASSIGNOR TO THE VESTERN WHEEL SCRAPER COMPANY, OF SAME PLACE.

ROAD-GRADER.

SPECIFICATION forming part of Letters-Patent No. 379,550, dated March 13, 1888. Application filed October 1S, 1887. Serial No. 252,696. (No model.)

To @ZZ whom, it may concern:

Be it known that I, S. FRANK WELcH, residing at Mount Pleasant, in the county of Henry and State of Iowa, and a citizen of the United States, have invented a new and useful Improvement in Road-Graders, of which the following is a specification. reference being had to the accompanying drawings, in which- Figure l is a plan. Fig. 2 is a rear elevation. Fig.V 3 is a side elevation. Fig. 4 is a detail, being a longitudinal section through the rings F G and pinion e. Fig. 5 is adetail, being a section at line so of Fig. l.

My invention relates to that class of roadgraders in which the scraper is supported by a frame mounted on wheels, and in which it can be adjusted vertically and laterally and can be set at different angles of diagonal adjustment to the road-bed.

The leading object of my invention is to provide convenient and eticient means by the use of which the various adjustments desired can be secured, which I accomplish as illustrated in the drawings, and as hereinafter fully Those things which I claim as new will be set forth in the claims.

In the drawings, A A represent the front and rear wheels of the road-grader, which wheels are supported on axles, as usual.

B B are the front and rear holsters. The front bolster is pivoted on the front axle and the rear bolsteris rigidly attached to the rear axle.

C is a frame supported by the holsters.

D is a draft-hook which passes through. the front axle, and is pivotally secured thereto by a king-bolt.

c is a loop which passes through the forward end of the draft-hook D, the forward end of the loop being connected with the tongue.

b is an upward projection from the rear end of the draft-hook D.

E E are two bars of a bifurcated beam having an eye at its front end, which is loosely attached to the projection b upon the drafthook D.

F is a flat metal ring rigidly secured to the under side of the bars E E. This fiat ring has a liange, c, at its lower inside edge.

G is another flat ring, which has a flange, d, at its outside upper edge, which flange d rests loosely on the ange c of the ring F, and this ring G can rotate freely within 'the ring F, and it is held in place by the bars E E', beneath which it is located.

H H' are arms the inner ends of which are rigidly secured` respectively, to the bars E E', and they are also secured to the plate F, and being located above the ring G, they aid in holding it in place.

I I are two curved arms, the upper ends of which are rigidly secured to the fiat ring G.

J is a transverselycurved scraperblade which is rigidly secured to the free ends of the curved arms I.

K is a toothed rack which is rigidly secured to the lower side of the flat ring G, and the rack extends nearly one-half the circumference of the ring. The rack maybe made integral with the ring G, or it may be bolted or riveted thereto.

e is a pinion at the rear of the iiat ring F.

and journaled thereto, which pinion engages with the rack K.

fis a shaft upon which the pinion@ is secured, and g is a hand-wheel at the upper end of the shaft f.

h is a pin arranged to engage with and lock the pinion c in any desired position, the pin 7L being operated by the hand-lever i.

j j are chains attached at one end to the rear ends of the bars E E or to the ring F, which chains cross each other, and, after passing around the sheaves la k, are attached to the opposite ends of a spiral grooved spool or drum, Z. This drum l is journalcd to a cross-piece, m, which forms a part of the main frame, and is secured to a shaft, n, to the upper end of which is secured a hand-wheel, o.

p is a pin used for locking the drum in any desired position, which pin is operated by a treadle, q.

L L are bars loosely attached at theirlower ends to the outer ends ofthe arms H H, and their upper ends are loosely attached to the opposite ends of a guide-bar, M. This bar M can slide freely up and down in guide-slots in the nprights N N', which are bolted to opposite sides of the main frame.

O is a cross-piece secured to the upper ends of the uprights N N.

r r are brackets secured near the upper ends IOO 2 Y Y Y Y 379.550

of the uprights N N', in which brackets are journaled short shafts which carry the gear-V wheels s s and pinions t t.

P P are rack-bars secured to the bar M, WithV which the pinions tt engage.

-u it are pinions attached to the ends ofthe shafts 'u o, which shafts are journaled at one end near the u per ends ot' the u ri 'lits N N',

D- P g and, extending rearward, are again journaled 1n the uprights Q. The pinions u u engageV with the gear-wheels s s. The shafts o o are provided with cranks a, and upon each shaft o is secured a notched wheel, b, Vwith which notched Wheels dogs c' engage.

R is a spring-bar, pivoted at one end to a cross-spring, S, the ends of which are secured to opposite sides of the fra me C. The rear end of this spring-bar R is connected with a chain, cZ, attached to the rear ends of the bars E E or t0 the flat ring VF.

In use tbe scraper-blade J can be adjusted diagonally to the main frame by means of the handwvheelg and pinion e, which engages With the rack K, which Vis secured to the ring G, which carries the scraperblade, and by means of the pin VZi the pinion c, Vand hence the scraper-blade, can be locked in any desired position.

The desired lateral adjustment'of the scraper can be obtained by means of the handwheel o,Y drum Z, and chains j, and the druu1,and hence the scraper, can be locked in any desired position by nieans of the pinp. The seraperblade can also be adjusted vertically by means of the cranks a', shafts o, geauwheels s, pinions t, rack-bars P, and bars M and L L. By operating either one of the cranksY a either end of the scraper-blade can be elevated or depressed independently of the other, as the ground to be operated upon may require.

The position of the scraper blade can be changed from right to left or from left to right by means ofthe chainsjj, druin Z, and hand- Wheel g, so as to deliver the earth either outside or inside of the Wheels, and as may be required by the various classes of work to be performed. The position of the scraper blade may be changed so as to throw the earth either to the right or to the left, and all of the necessary-adjnstnieuts can be easilyand conveniently made,

by means ofthe devices shown and described,

by an operatorsuitablylocated on the machine. 4

Thesprings R and S sustain a portion of the Weight Vof the scraper-blade and its attach'- nients, thus making it more easy to adjust the blade'verticaily without interfering With its lateral movement.

I ain aware that Letters Pal ent of the United States have beenissued. one No. 363.342,(lated May 17, 1887, one No. 370,655, dated VSeptember 27, 1887, and one No. 370,806, dated October 4,1887; and l do notiutendto claim as my invention anything whichY is shown and described in either of the said patents. Neither do I intend to claim', broadly, he use of chains for the purpose of giving lateral adjustment to the scraper.

VVhat VI claimas new, and desireV to secure by Letters Patent, is-

l. In aroad-grader, the combination of a frame supported by wheels, a draft-bar for the scraper, as E E', pivotally supported atits forward end, a ring, F,a ring, G, a rack, K, secured to said ring G. a scraper-blade supported by the ring G, and a pinion engaging with said rack, substantially as and'for the purposes specified.

2. In a road-grader, the combination of a frame supported by Wheels, a draft-barter the scraper, as E E. rings F and G, a scraper-blade supported by the ring G.chainsjj,and drum Z, substantially as and for the purposes specified.

3. In a road-grader, the combination of a frame supported by wheels, a draft-bar for the scraper, as E E', rings F and G,a scraper-blade supported by the ring G, bars H H', bars L L', bar M,rackbars VP l?, gear-Wheels srs, and de vices for rotating` said gear-Wheels, substantially as and for the purposes specified.

4. In a road-grader,the combination of a main frame, a draftbar which supports a scraper, a spring bar, S, secured at its ends to the main frame, and a spring-bar, R, pivoted at one end to the bar S and connected at the other end with a chain, ZZ', attached as de scribed, substantially as and for the purpose specified.

S. FRANK VELCH.

Witnesses:

ROBT. S. GiLLis, J As. T. WHITING. 

